A sodium carboxymethyl cellulose cyclic crushing and dust removal device

Abstract

The present invention relates to the technical field of sodium carboxymethylcellulose granulation, and particularly relates to a sodium carboxymethylcellulose circulating pulverizing and dust removing device. A feed hopper assembly, a screw conveyor and a screening assembly are fixed on a frame; the screening assembly includes a discharge outer barrel body, a discharge inner barrel body and a sorting assembly; the bottom end of the discharge port of the feed hopper assembly is connected with a pulverizing pipe body, and the pulverizing pipe body is sequentially provided with a crushing cavity, a convex ring, a lower cavity and a filtering cavity from top to bottom in the height direction; a valve core assembly is used for sealing the end face of the convex ring when the main body of the crushing knife rotates; a plurality of filtering holes are uniformly distributed on the surface of the filtering cavity; a sealing box is sleeved outside the filtering cavity; an air inlet pipe of an air purification device is communicated with the sealing box. The beneficial effects of using the present invention are as follows: the screening efficiency and screening accuracy are improved. During the granulation process, through the dust removal treatment before screening, the adhesion of dust on the surface of the finished granular material is reduced, so as to ensure the dissolution rate of sodium carboxymethylcellulose.

Description

Technical Field

[0001] The present invention relates to the technical field of sodium carboxymethyl cellulose granulation, and particularly relates to a sodium carboxymethyl cellulose circulating pulverizing and dust removing device. Background Art

[0002] Sodium carboxymethyl cellulose is a type of cellulose with a wide range of applications and large consumption today. It is widely used in drilling mud treatment agents in the petroleum industry, synthetic detergents, organic co-washing agents, textile sizing agents for printing and dyeing, water-soluble colloidal thickeners for daily chemical products, thickening and emulsifying agents for the pharmaceutical industry, thickeners for the food industry, adhesives for the ceramic industry, industrial pastes, sizing agents for the paper industry, etc. When sodium carboxymethyl cellulose needs to be used after being dissolved in water, due to the small gaps between powdered sodium carboxymethyl cellulose, the powder has a small water contact surface, and during the dissolution process, it is prone to agglomeration, floating on the water surface, and has a slow dissolution speed. Therefore, it is necessary to control the water temperature, stir and dissolve, etc.; while sodium carboxymethyl cellulose made into particles of a certain particle size can avoid the above problems and accelerate the dissolution speed.

[0003] During the granulation process of sodium carboxymethyl cellulose, the moist sodium carboxymethyl cellulose is made into a mixture by mixing and stirring with cooked glue in a certain proportion, and then made into pellets of a specified specification after being pulverized and screened multiple times. During the pulverizing and granulating process, on the one hand, it is necessary to screen the particles with a larger particle size and then re-introduce them into the pulverizing device for further processing to the specified specification. On the other hand, it is necessary to remove the dust-grade pellets with a smaller particle size and that are easily adhered to the surface of the qualified pellets to eliminate the impact on the subsequent dissolution. At the same time, the pellets containing a large amount of dust entering the screening device will also block the screening powder holes and affect the granulation efficiency; therefore, removing the dust during the pulverizing and granulating process is not only beneficial to improving the screening efficiency, but also beneficial to improving the quality of sodium carboxymethyl cellulose pellets. Summary of the Invention

[0004] The purpose of the present invention is to improve the sodium carboxymethyl cellulose granulating device in view of the defects and deficiencies of the prior art, and provide a sodium carboxymethyl cellulose circulating pulverizing and dust removing device.

[0005] A sodium carboxymethyl cellulose circulating pulverizing and dust removing device described in the present invention includes a frame; a feed barrel assembly, a screw conveyor, and a screening assembly are fixed on the frame; the screening assembly includes an outer discharge barrel body, an inner discharge cylinder body, and a sorting assembly; the screw conveyor is used to convey the pellets on the outer discharge barrel body into the feed barrel assembly.

[0006] The bottom end of the discharge port of the feeding bucket assembly is connected with a crushing pipe body; the crushing pipe body is sequentially provided with a crushing cavity, a convex ring, a lower cavity and a filtering cavity from top to bottom in the height direction; a crushing knife body is arranged inside the crushing cavity; a valve core assembly is arranged inside the lower cavity; the valve core assembly is used for sealing the end face of the convex ring when the crushing knife body rotates; a crushing motor is arranged on the feeding bucket assembly; the output end of the crushing motor is fixed to the crushing knife body; the top of the crushing pipe body is communicated with the feeding bucket assembly; a plurality of filtering holes are uniformly distributed on the surface of the filtering cavity; a sealing box is sleeved outside the filtering cavity; an air purification device is fixed on the rack; an air inlet pipe of the air purification device is communicated with the sealing box.

[0007] Further, the inner hole diameter of the filtering cavity is larger than that of the crushing cavity; a plurality of spring strips are arranged on the inner side wall of the filtering cavity; one end of each spring strip is fixed on the inner side wall of the filtering cavity.

[0008] Further, the valve core assembly includes a sealing plate driving motor, a lead screw nut, a lead screw threadedly connected in the lead screw nut, and a sealing plate connected to the lead screw nut; a chamfer surface connected to the top surface is arranged at the top edge of the sealing plate; the lead screw nut is slidably connected to the inner side surface of the crushing pipe body; one end of the sealing plate driving motor is fixed to the inner side surface of the crushing pipe body through a second motor bracket; the other end of the sealing plate driving motor is fixed to the lead screw.

[0009] Further, connecting rods are arranged on both sides of the lead screw nut; guide posts are fixed on the connecting rods; guide grooves slidably connected to the guide posts are arranged on the crushing pipe body; one end of the crushing pipe body extending into the feeding bucket assembly is provided with a feeding groove; the feeding groove is arranged on the side surface of the crushing pipe body;

[0010] A groove communicated with the feeding groove is arranged on the inner side surface of the crushing pipe body; the groove is communicated with the guide groove; a sealing ring is slidably connected in the groove; the guide post is fixed on the sealing ring; a sealing ring feeding groove is formed on the side surface of the sealing ring; a spring is connected between the sealing plate and the lead screw nut.

[0011] The feeding bucket assembly is composed of a feeding outer barrel body and an inner partition cylinder coaxially arranged inside the feeding outer barrel body; the crushing motor is fixed inside the inner partition cylinder; the top end of the crushing pipe body is fixedly connected with the bottom end of the inner partition cylinder.

[0012] Further, a feeding storage cavity is formed between the feeding outer barrel body and the inner partition cylinder; an exhaust pipe of the air purification device is communicated in the feeding storage cavity; a pressure relief valve is connected in the feeding storage cavity.

[0013] Further, the sorting component is a centrifugal plate arranged on the top surface of the inner discharge cylinder; a retaining ring is arranged on the bottom surface of the centrifugal plate; the retaining ring is rotatably connected to the inner side wall of the inner discharge cylinder; a plurality of sieve holes are evenly distributed on the surface of the centrifugal plate; the sieve holes are all arranged above the inner discharge cylinder; a screening motor is arranged inside the inner discharge cylinder; the screening motor is fixed on the inner discharge cylinder through a first motor bracket; the output end of the screening motor is fixed on the centrifugal plate.

[0014] Further, a plurality of retaining rings coaxial with the centrifugal plate are arranged on the surface of the centrifugal plate; the cross section of the retaining ring is in a semi-circular shape with the opening facing downwards; a support ring is arranged on the inner side wall of the outer discharge barrel; a cover plate is placed on the support ring.

[0015] Further, the height from the top end of the retaining ring to the surface of the centrifugal plate is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole.

[0016] Further, a hemispherical convex surface is arranged at the center of rotation of the centrifugal plate; the hemispherical convex surface is coaxial with the crushing tube body; a plurality of sets of diversion strips are arranged on the surface of the centrifugal plate; the sets of diversion strips are coaxial with the hemispherical convex surface; the sets of diversion strips are composed of a plurality of U-shaped diversion plates; the diversion plates are circumferentially distributed on the centrifugal plate; the diversion plates between adjacent sets of diversion strips are arranged in a staggered manner.

[0017] Further, the diversion plate is a U-shaped plate; the bottoms of the U-shaped plates all face the center of the centrifugal plate; the bottoms of the U-shaped plates are arranged as V-shaped cones.

[0018] The above at least one technical solution adopted can achieve the following beneficial effects:

[0019] 1. Reduce the entry of small-particle-size materials and dust into the screening component, prevent the screening holes in the screening component from being blocked, and improve the screening efficiency, accuracy, and screening efficiency.

[0020] 2. During the granulation process, through the dust removal treatment before screening, reduce the adhesion of dust on the surface of the finished product particles, and provide a guarantee for the rapid dissolution of sodium carboxymethylcellulose particles.

[0021] 3. Through dust suction in cooperation with screening, screen qualified particles, return large particles through a screw conveyor to form an internal circulation, eliminate the need for manual extra processing of large-sized materials, reduce labor intensity, and improve granulation efficiency.

[0022] 4. The amount of each crushing is determined by the volume of the crushing cavity. The mixture is crushed in batches in small quantities, which is easy to adjust the rotation speed of the crushing motor, making the finished product particle size stable and the finished product rate higher. Description of the Drawings

[0023] Figure 1 is the first - perspective three - dimensional view of the present invention;

[0024] Figure 2 is the second - perspective three - dimensional view of the present invention;

[0025] Figure 3 is the sectional view of the feed hopper assembly;

[0026] Figure 4 is the sectional view of the crushing motor and the crushing pipe body connected to the feed hopper assembly;

[0027] Figure 5 is the three - dimensional view of the crushing pipe body;

[0028] Figure 6 is the structural diagram of the valve core assembly;

[0029] Figure 7 is the structural diagram of the valve core assembly inside the crushing pipe body;

[0030] Figure 8 is the structural diagram of half of the crushing pipe body;

[0031] Figure 9 is the cross - sectional view of the crushing pipe body;

[0032] Figure 10 is the structural diagram of the screening assembly;

[0033] Figure 11 is the three - dimensional view of the screening assembly;

[0034] Figure 12 is the structural diagram of the connection between the centrifugal plate and the screening motor;

[0035] Figure 13 is the top - view of the centrifugal plate;

[0036] Figure 14 is the partial view of the centrifugal plate;

[0037] Explanation of reference numerals:

[0038] A, Feed hopper assembly; A1, Feed door; A2, Pressure relief valve; A3, Outer feed barrel body; A4, Feed storage chamber; A5, Inner partition cylinder; B, Crushing motor; B1, Main crushing knife; C, Screw conveyor; C1, Return material discharge pipe; C2, Return material feed pipe; D, Frame; E, Air purification device; E1, Exhaust pipe; E2, Intake pipe; F, Screening assembly; F1, Screening motor; F101, First motor bracket; F2, Outer discharge barrel body; F3, Inner discharge cylinder body; F4, Support ring; F5, Cover plate; G, Sealing box; H, Crushing tube body; H1, Feed chute; H2, Filter chamber; H201, Filter holes; H3, Material distribution baffle; H4, Guide groove; H401, Avoidance hole; H5, Spring strip; H6, Convex ring; H7, Crushing cavity; H8, Lower cavity; H9, Groove; I, Valve core assembly; I1, Sealing ring; I101, Sealing ring feed groove; I2, Guide post; I3, Sealing plate; I301, Chamfered surface; I4, Spring; I5, Screw nut; I501, Connecting rod; I6, Screw rod; I7, Sealing plate driving motor; I701, Second motor bracket; J, Centrifugal plate; J1, Retaining ring; J2, Roller; J3, Hemispherical convex surface; J4, Diverting plate; J401, V-shaped cone; J5, Retaining ring; J6, Sieve holes. Detailed implementation mode

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] As Figures 1 to 14 shown, a sodium carboxymethyl cellulose cyclic crushing and dust removal device of the present invention includes a frame D; a feed hopper assembly A, a screw conveyor C and a screening assembly F are fixed on the frame D; the screening assembly F includes an outer discharge barrel body F2, an inner discharge cylinder body F3 and a sorting assembly; the sorting assembly is used to sort the granular materials with large particle size onto the outer discharge barrel body F2; the sorting assembly is used to sort the granular materials with small particle size onto the inner discharge cylinder body F3; the screw conveyor C is used to convey the granular materials in the outer discharge barrel body F2 into the feed hopper assembly A; the bottom end of the discharge port of the feed hopper assembly A is connected with a crushing tube body H; the crushing tube body H is sequentially provided with a crushing cavity H7, a convex ring H6, a lower cavity H8 and a filter chamber H2 from top to bottom along the height direction.

[0041] A main crushing knife B1 is arranged inside the crushing cavity H7; the main crushing knife B1 matches the inner cavity of the crushing cavity H7; a valve core assembly I is arranged inside the lower cavity H8; the valve core assembly I is used to seal the end face of the convex ring H6 when the main crushing knife B1 is rotating; a crushing motor B is arranged on the feed hopper assembly A; the output end of the crushing motor B is fixed on the main crushing knife B1; the top of the crushing tube body H is connected with the feed hopper assembly A.

[0042] A plurality of filter holes H201 are evenly distributed on the surface of the filter chamber H2; a sealing box G is sleeved outside the filter chamber H2; an air purification device E is fixed on the frame D; an air inlet pipe E2 of the air purification device E is communicated with the sealing box G;

[0043] The main body of the crushing knife B1 has no essential difference from the prior art, so it will not be elaborated here; according to the particle size of the processed granule, the rotation speed of the crushing motor B is adjusted and the model of the corresponding main body of the crushing knife B1 is selected; the cross-sectional area of the crushing cavity H7 can be designed according to the production capacity; the air purification device E and the screw conveyor C have no essential difference from the prior art, so they will not be elaborated here; the feeding end and the discharging end of the screw conveyor C are respectively connected with a return material feeding pipe C2 and a return material discharging pipe C1;

[0044] A feeding door A1 is arranged on the feeding barrel assembly A. When it is necessary to add the preliminarily crushed mixture, the feeding door A1 is opened; in the crushing working state, the feeding door A1 is closed; the valve core assembly I is sealed on the convex ring H6, so that the bottom end of the crushing cavity H7 is in a sealed state;

[0045] The mixture inside the feeding barrel assembly A enters the crushing cavity H7. The main body of the crushing knife B1 is driven by the crushing motor B to move. After being crushed for a set time, the valve core assembly I is separated from the convex ring H6, and the granules in the crushing cavity H7 pass through the convex ring H6, the lower cavity H8, and the filter chamber H2 and enter the screening assembly F;

[0046] The granules meeting the specifications are sorted into the inner discharging cylinder F3 by the screening assembly F, and the granules not meeting the specifications are sorted into the outer discharging barrel F2; the granules in the inner discharging cylinder F3 are discharged and bagged through the discharging pipe at the bottom; the granules in the outer discharging barrel F2 re-enter the feeding barrel assembly A through the funnel arranged at the bottom of the outer discharging barrel F2, the return material feeding pipe C2, the screw conveyor C, and the return material discharging pipe C1; when the granules enter the filter chamber H2, due to the strong negative pressure generated by the air purification device E, the dust with smaller particle size is sucked in through the filter holes H201 and then filtered and collected, greatly reducing the entry of small-particle-size granules and dust into the screening assembly F.

[0047] As a preferred embodiment of the present invention, the inner hole diameter of the filtering cavity H2 is larger than that of the crushing cavity H7; a plurality of spring strips H5 are arranged on the inner side wall of the filtering cavity H2; one end of each spring strip H5 is fixed on the inner side wall of the filtering cavity H2, and the other end is a free end; when the granular material falls into the filtering cavity H2, the granular material will have an elastic collision with the spring strips H5. The first collision changes the movement direction of the granular material, and the granular material bounces up and has a secondary collision with the granular material in the incoming material direction. Each collision causes the dust adhering to the granular material to separate from the granular material due to inertia and be sucked into the filtering cavity H2; in addition, the spring strips H5 are integrated in the filtering cavity H2, and the plurality of spring strips H5 generate micro-vibrations due to the impact, which can cause the filtering cavity H2 to vibrate at a high frequency and with a small amplitude, helping to remove the dust accumulated in the filtering holes H201 and reducing the risk of blockage of the filtering holes H201. By enlarging the diameter of the filtering cavity H2, in addition to being able to arrange more spring strips H5, it can also provide a larger movement space for the particles, increase the number of contacts between the granular material and the elastic pieces, make it easier for the dust to separate from the granular material, and improve the dust removal effect of the granular material.

[0048] As a preferred embodiment of the present invention, the valve core assembly I includes a sealing plate driving motor I7, a lead screw nut I5, a lead screw I6 threadedly connected in the lead screw nut I5, and a sealing plate I3 connected to the lead screw nut I5; a chamfer surface I301 is provided at the edge of the top surface of the sealing plate I3; the lead screw nut I5 is slidably connected to the inner surface of the crushing tube body H; one end of the sealing plate driving motor I7 is fixed on the inner surface of the crushing tube body H through a second motor bracket I701, and the other end is fixed on the lead screw I6;

[0049] The diameter of the sealing plate I3 is larger than the inner hole diameter of the convex ring H6 and smaller than the diameter of the lower cavity H8; the sealing plate driving motor I7 drives the lead screw I6 to rotate, and the lead screw nut I5 pushes the sealing plate I3 to move. The chamfer surface I301 of the sealing plate I3 seals the convex ring H6 to ensure that the uncrushed mixture in the crushing cavity H7 does not fall into the lower cavity H8 when the crushing knife body B1 is working and when the crushing cavity H7 is feeding; when the mixture in the crushing cavity H7 is crushed for a specified time, the sealing plate driving motor I7 drives the lead screw I6 to rotate, so that the lead screw nut I5 pushes the sealing plate I3 to move downward, and the sealing plate I3 leaves the convex ring H6 by a certain distance. The material in the crushing cavity H7 will fall from the inner side wall of the lower cavity H8 into the filtering cavity H2 due to gravity.

[0050] As a preferred embodiment of the present invention, connecting rods I501 are provided on both sides of the lead screw nut I5; guide posts I2 are fixed on the connecting rods I501; guide grooves H4 slidably connected to the guide posts I2 are provided on the crushing tube body H; one end of the crushing tube body H extending into the feed bucket assembly A is provided with a feed groove H1; the feed groove H1 is arranged on the side surface of the crushing tube body H;

[0051] On the inner surface of the crushing tube body H, a groove H9 communicating with the feed groove H1 is provided; the groove H9 communicates with the guide groove H4; a sealing ring I1 is slidably connected in the groove H9; the guide post I2 is fixed on the sealing ring I1; a sealing ring feed groove I101 is formed on the side surface of the sealing ring I1; a spring I4 is connected between the sealing plate I3 and the lead screw nut I5;

[0052] The feed bucket assembly A is composed of a feed outer barrel body A3 and an inner partition cylinder A5 coaxially arranged inside the feed outer barrel body A3; the crushing motor B is fixed inside the inner partition cylinder A5; the top end of the crushing tube body H is fixedly connected to the bottom end of the inner partition cylinder A5;

[0053] For the convenience of processing, the crushing tube body H is composed of two semi-circular tubes, which is convenient for the opening of the guide groove H4. An avoidance hole H401 is also opened on the sliding path of the connecting rod I501, which can be used for the avoidance of the sliding of the connecting rod I501;

[0054] After the lead screw nut I5 is driven by the sealing plate driving motor I7, three different effects will occur. First, the sealing plate I3 leaves the convex ring H6 by a certain distance, so that the materials in the crushing cavity H7 are discharged into the filtering cavity H2. In this state, the sealing ring I1 blocks the feed groove H1, and the materials in the feed outer barrel body A3 cannot enter the crushing tube body H. Second, the spring I4 presses the sealing plate I3 tightly against the convex ring H6 for sealing, and the sealing ring I1 blocks the feed groove H1. This state is the working state of the crushing knife body B1. Neither feeding nor discharging can occur in the crushing tube body H. Third, the lead screw nut I5 continues to rise, the sealing ring I1 is further pushed upward until the sealing ring feed groove I101 is aligned with the feed groove H1, the spring I4 is further compressed, and the sealing plate I3 maintains the state of pressing tightly against the convex ring H6; the mixed materials in the feed outer barrel body A3 can enter the crushing tube body H through the feed groove H1 and the sealing ring feed groove I101; through a linear motion module, the valve core assembly I can be switched among three states of feeding, sealing and discharging, completing the automatic feeding, discharging and different states of forming an independent crushing space in the crushing tube body H. The valve body structure inside the crushing tube body H is more concise, reducing the total cost of the valve body.

[0055] In addition to being used to install the crushing motor B, the inner partition cylinder A5 is also used to provide an exhaust space for the mixture to enter the crushing tube body H after sealing the convex ring H6 on the chamfered surface I301 of the sealing plate I3, ensuring smoother feeding of the crushing tube body H.

[0056] As a preferred embodiment of the present invention, a feed storage chamber A4 is formed between the outer feed barrel A3 and the inner partition cylinder A5; the exhaust pipe E1 of the air purification device E communicates with the feed storage chamber A4; a pressure relief valve A2 is connected in the feed storage chamber A4;

[0057] The power of the air purification device E is selected according to the pressure provided to the feed storage chamber A4;

[0058] Two pipelines are provided on the air purification device E; the first pipeline includes an intake pipe E2, a filter element of the air purification device E, a fan of the air purification device E, and a first air outlet; the second pipeline includes a second intake port, a filter element of the air purification device E, a fan of the air purification device E, and an exhaust pipe E1;

[0059] The on-off of the two pipelines is controlled by solenoid valves respectively;

[0060] The pressure relief valve A2 has no essential difference from the prior art, so it will not be described in detail here.

[0061] When the first pipeline is in use, for the dust filtration state in the filtration chamber H2, the gas in the filtration chamber H2 passes through the intake pipe E2, the filter element of the air purification device E, and the fan of the air purification device E, and then is discharged from the first air outlet; when the second pipeline is in use, external air enters through the second intake port, passes through the filter element of the air purification device E and the fan of the air purification device E, and then enters the feed storage chamber A4 through the exhaust pipe E1,

[0062] When feeding from the feed storage chamber A4 into the crushing tube body H, the second pipeline is opened, and a positive pressure is generated in the feed storage chamber A4 by the air purification device E to accelerate the mixture in the feed storage chamber A4 to enter the crushing tube body H, preventing material jamming at the bottom of the feed storage chamber A4; the air entering the feed storage chamber A4 can be purified and filtered, reducing the pollution of the feed storage chamber A4; since the feed storage chamber A4 is continuously supplied with air by the air purification device E on one side and the air pressure is adjusted by setting the pressure relief valve A2 on the other side, the feed storage chamber A4 can meet the air pressure for accelerating feeding while ensuring that the air pressure in the feed storage chamber A4 is not too high.

[0063] As a preferred embodiment of the present invention, the sorting assembly is a centrifugal plate J disposed on the top surface of the inner discharge cylinder F3; a retaining ring J1 is provided on the bottom surface of the centrifugal plate J; the retaining ring J1 is rotatably connected to the inner side wall of the inner discharge cylinder F3; a plurality of sieve holes J6 are uniformly distributed on the surface of the centrifugal plate J; the sieve holes J6 are all disposed above the inner discharge cylinder F3; a screening motor F1 is disposed inside the inner discharge cylinder F3; the screening motor F1 is fixed to the inner discharge cylinder F3 by a first motor bracket F101; the output end of the screening motor F1 is fixed to the centrifugal plate J;

[0064] Rollers J2 that are in close contact with the inner surface of the inner discharge cylinder F3 are provided on the outer surface of the retaining ring J1; a rolling connection is formed between the rollers J2 and the inner discharge cylinder F3;

[0065] The screening motor F1 drives the centrifugal plate J to rotate, and the granular materials falling from the filtering chamber H2 enter the surface of the centrifugal plate J; the rotation of the centrifugal plate J provides a tangential velocity for the granular materials, causing the granular materials to gradually disperse automatically in the radial direction; the granular materials that meet the specifications fall into the inner discharge cylinder F3 through the sieve holes J6, and the granular materials that do not meet the specifications fly out from the outside of the centrifugal plate J and fall into the outer discharge barrel F2.

[0066] As a preferred embodiment of the present invention, a plurality of retaining rings J5 coaxial with the centrifugal plate J are provided on the surface of the centrifugal plate J; the cross section of the retaining ring J5 is in a semi-circular shape with an opening facing downward; a support ring F4 is provided on the inner side wall of the outer discharge barrel F2; a cover plate F5 is placed on the support ring F4;

[0067] By providing multiple layers of retaining rings J5, on the one hand, the radial movement of the granular materials can be decelerated, making it easier for the granular materials that meet the specifications to enter the sieve holes J6; on the other hand, when the granular materials pass through the retaining rings J5, they form a tumbling motion, changing the movement direction of the granular materials, causing the granular materials to make a wave-like jump between the cover plate F5 and the centrifugal plate J, increasing the probability of the granular materials entering the sieve holes J6, enabling the granular materials to be screened out more quickly, allowing the diameter of the centrifugal plate J to be made smaller, and reducing the volume of the entire screening assembly F.

[0068] As a preferred embodiment of the present invention, the height from the top end of the retaining ring J5 to the surface of the centrifugal plate J is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole J6; the height from the top end of the retaining ring J5 to the surface of the centrifugal plate J is equivalent to the radius of the retaining ring J5. Therefore, the height of the retaining ring J5 is less than the radius of the granular materials, enabling the granular materials to jump and tumble smoothly when encountering the retaining ring J5, increasing the probability of the granular materials entering the sieve holes J6, and improving the screening accuracy and screening efficiency.

[0069] As a preferred embodiment of the present invention, a hemispherical convex surface J3 is provided at the rotation center of the centrifugal plate J; the hemispherical convex surface J3 is coaxially arranged with the crushing tube body H; a plurality of sets of flow dividing strips are arranged on the surface of the centrifugal plate J; the flow dividing strip sets are coaxially arranged with the hemispherical convex surface J3; the flow dividing strip sets are composed of a plurality of U-shaped flow dividing plates J4; the flow dividing plates J4 are circumferentially distributed on the centrifugal plate J;

[0070] The flow dividing plates J4 between adjacent flow dividing strip sets are arranged in a staggered manner;

[0071] A plurality of material dividing baffle strips H3 are evenly distributed at the bottom end of the crushing tube body H; the material dividing baffle strips H3 can disperse the granular materials, and the granular materials can enter the centrifugal plate J more evenly;

[0072] The number of the flow dividing strip sets is at least two, and the number of the flow dividing strip sets is set according to the discharging speed of the crushing tube body H.

[0073] The granular materials entering the crushing tube body H are divided into various directions of the centrifugal plate J through the hemispherical convex surface J3, and multi-stage flow division is formed through multiple sets of flow dividing strips. In addition, when the granular materials move radially, they successively encounter different retaining rings J5 and the flow dividing plates J4 of the flow dividing strip sets for dispersion and speed reduction. This not only can divide the materials into multiple material streams to prevent the accumulation of granular materials, but also can reduce the radial movement speed of the granular materials and prolong the movement time of the materials on the centrifugal plate J; the combined action of the two can increase the chance of the granular materials contacting the sieve holes J6 and improve the screening efficiency.

[0074] As a preferred embodiment of the present invention, the flow dividing plate J4 is a U-shaped plate; the bottoms of the U-shaped plates are all arranged towards the center of the centrifugal plate J; the bottoms of the U-shaped plates are provided with V-shaped cones J401; the V-shaped cones J401 can complete flow division and rapid guiding; a channel for materials is formed between two flow dividing plates J4, and since the movement direction of the granular materials is changed after being divided by the V-shaped cones J401, they collide and rebound with the side surfaces of the adjacent flow dividing plates J4, increasing the probability of the granular materials passing through the sieve holes J6 and further improving the screening accuracy and screening efficiency.

[0075] When using the present invention, its working process is as follows: Step 1, open the feeding door A1 and put the pre-crushed mixture into the feeding storage cavity A4. Step 2, start the sealing plate driving motor I7. The sealing plate I3 seals on the end face of the convex ring H6, so that the bottom of the crushing cavity H7 is sealed, and the sealing ring feeding groove I101 is aligned with the feeding groove H1. The mixture in the feeding storage cavity A4 enters the crushing cavity H7 through the feeding groove H1. Step 3, after the crushing cavity H7 is filled with the mixture, the sealing plate driving motor I7 is started again. The sealing ring I1 moves, so that the sealing ring feeding groove I101 is misaligned with the feeding groove H1, and the mixture in the feeding storage cavity A4 cannot enter the crushing cavity H7; at the same time, due to the action of the spring I4, the sealing plate I3 also seals at the bottom of the crushing cavity H7. Step 4, the crushing motor B drives the crushing knife body B1 to move in the crushing cavity H7 to crush the mixture for a certain period of time. Step 5, the sealing plate driving motor I7 is started again, and the sealing plate I3 moves away from the convex ring H6. In this state, the sealing ring feeding groove I101 remains misaligned with the feeding groove H1, so that the granular material can fall from the gap between the convex ring H6 and the sealing plate I3. Step 6, the granular material (including the granular powder of over-crushed) enters the filtering cavity H2 and collides with the spring strip H5. After the collision, the movement path of the granular material changes and impacts occur, so that the powder on the surface of the granular material is separated from the granular material; the powder is sucked away from the filtering hole H201, and the granular material falls from below the filtering cavity H2 between the cover plate F5 and the diversion plate J4. Step 7, the granular material is diverted in all directions of the centrifugal plate J through the hemispherical convex surface J3. The rotating centrifugal plate J generates a centrifugal force, so that the granular material is dispersed outward. Finally, the granular material with a particle size smaller than the sieve hole J6 falls from the sieve hole J6 into the inner discharge cylinder F3; the granular material with a particle size larger than the sieve hole J6 is sorted from the edge of the centrifugal plate J into the outer discharge barrel F2; in this step, through the arranged retaining ring J5, on the one hand, the radial movement speed of the granular material can be reduced, so that the granular material meeting the specifications can more easily enter the sieve hole J6; on the other hand, when the granular material passes through the retaining ring J5, it forms a tumbling, changing the movement direction of the granular material, so that the granular material makes a wave-like jump between the cover plate F5 and the centrifugal plate J, increasing the probability of the granular material entering the sieve hole J6. Through the multi-stage misaligned arranged diversion plate J4, the granular material is dispersed into multiple strands of granular material flows and the speed is reduced. Step 8, the screw conveyor C recovers the granular material with a larger particle size in the outer discharge barrel F2 and inputs it into the feeding storage cavity A4 through the return material feeding pipe C2 and the return material discharge pipe C1.

[0076] Through this embodiment, the beneficial effects of the present invention are as follows:

[0077] 1. Reduce the entry of small particle size granular materials and dust into the screening assembly, prevent the screening holes in the screening assembly from being blocked, and improve the screening efficiency, screening accuracy and screening efficiency.

[0078] 2. During the granulation process, through dust removal treatment before screening, the dust adhesion on the surface of the finished granule is reduced, providing guarantee for the rapid dissolution of sodium carboxymethylcellulose granules.

[0079] 3. Through vacuuming in cooperation with screening, the qualified granules are screened, and the large granules are returned through a screw conveyor to form an internal circulation. There is no need for manual extra treatment of large-sized materials, reducing labor intensity and improving the granulation efficiency.

[0080] 4. The amount of each crushing is determined by the volume of the crushing cavity. The mixed material is crushed in batches with small quantities, which is easy to adjust the rotation speed of the crushing motor, making the particle size of the finished product stable and the finished product rate higher.

[0081] 5. The granules and multiple spring strips cause the dust from transitional crushing to separate from the granules due to inertia and be sucked into the air purification device together with the granules whose particle size is smaller than the filter holes; moreover, the granules hitting the spring strips generate micro-vibrations, which can make the filter cavity vibrate at high frequency with small amplitude, helping to remove the dust accumulated in the filter holes and reducing the risk of filter hole blockage.

[0082] 6. Through a linear motion module, the switching of three states of the valve core assembly, namely feeding, sealing, and discharging, is realized, completing automatic feeding, discharging, and the formation of an independent crushing space in the crushing tube body, which can make the valve body structure inside the crushing tube body more concise and the equipment cost lower.

[0083] 7. When feeding from the feeding storage cavity into the crushing tube body (in the non-dust removal state), the purified air discharged from the original air purification device is used to generate positive pressure in the feeding storage cavity, accelerating the material in the feeding storage cavity to enter the crushing tube body and preventing material jamming at the bottom of the feeding storage cavity.

[0084] 8. By setting multiple layers of retaining rings and a shunt bar group to slow down the granules, on the one hand, the granules meeting the specifications are more likely to enter the sieve holes; on the other hand, when the granules pass through the retaining rings, they form tumbling, changing the movement direction of the granules, making the granules jump in a wave-like manner between the cover plate and the centrifugal plate, further increasing the probability of the granules passing through the sieve holes and improving the screening efficiency of qualified granules. At the same time, the diameter of the centrifugal plate can also be made smaller, and the volume of the entire screening assembly can also be made smaller.

[0085] The above is only the preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of this invention patent application are included in the scope of this invention patent application.

Claims

1. A sodium carboxymethyl cellulose cyclic pulverizing and dust removing device, which comprises a machine frame (D); a feeding barrel assembly (A), a screw conveyor (C) and a screening assembly (F) are fixed on the machine frame (D); the screening assembly (F) includes a discharge outer barrel body (F2), a discharge inner cylinder body (F3) and a sorting assembly; the screw conveyor (C) is used to convey the granular materials on the discharge outer barrel body (F2) into the feeding barrel assembly (A). It is characterized in that: The bottom end of the discharge port of the feeding barrel assembly (A) is connected with a pulverizing pipe body (H); the pulverizing pipe body (H) is sequentially provided with a crushing cavity (H7), a convex ring (H6), a lower cavity (H8) and a filtering cavity (H2) from top to bottom in the height direction; a crushing knife body (B1) is arranged inside the crushing cavity (H7); a valve core assembly (I) is arranged inside the lower cavity (H8); the valve core assembly (I) is used to seal the end face of the convex ring (H6) when the crushing knife body (B1) is rotating; a crushing motor (B) is arranged on the feeding barrel assembly (A); the output end of the crushing motor (B) is fixed to the crushing knife body (B1); the top of the pulverizing pipe body (H) is communicated with the feeding barrel assembly (A); a plurality of filtering holes (H201) are evenly distributed on the surface of the filtering cavity (H2); a sealing box (G) is sleeved outside the filtering cavity (H2); an air purification device (E) is fixed on the machine frame (D); an air inlet pipe (E2) of the air purification device (E) is communicated with the sealing box (G). The valve core assembly (I) includes a sealing plate driving motor (I7), a screw nut (I5), a screw rod (I6) threadedly connected inside the screw nut (I5) and a sealing plate (I3) connected to the screw nut (I5); a chamfer surface (I301) connected to the top surface is arranged at the top edge of the sealing plate (I3); the screw nut (I5) is slidably connected to the inner side surface of the pulverizing pipe body (H); one end of the sealing plate driving motor (I7) is fixed to the inner side surface of the pulverizing pipe body (H) through a second motor bracket (I701); the other end of the sealing plate driving motor (I7) is fixed to the screw rod (I6). Connecting rods (I501) are arranged on both sides of the screw nut (I5); guide posts (I2) are fixed on the connecting rods (I501); a guide groove (H4) slidably connected to the guide posts (I2) is arranged on the pulverizing pipe body (H); one end of the pulverizing pipe body (H) extending into the feeding barrel assembly (A) is provided with a feeding groove (H1); the feeding groove (H1) is arranged on the side surface of the pulverizing pipe body (H). The inner surface of the crushing tube body (H) is provided with a groove (H9) communicating with the feed chute (H1); the groove (H9) communicates with the guiding groove (H4); a sealing ring (I1) is slidably connected in the groove (H9); the guiding column (I2) is fixed on the sealing ring (I1); a sealing ring feed chute (I101) is formed on the side surface of the sealing ring (I1); a spring (I4) is connected between the sealing plate (I3) and the lead screw nut (I5); The feed bucket assembly (A) is composed of a feed outer barrel body (A3) and an inner partition cylinder (A5) coaxially arranged inside the feed outer barrel body (A3); the crushing motor (B) is fixed inside the inner partition cylinder (A5); the top end of the crushing tube body (H) is fixedly connected to the bottom end of the inner partition cylinder (A5).

2. The sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 1, wherein: The inner hole diameter of the filtering cavity (H2) is larger than that of the crushing cavity (H7); multiple spring strips (H5) are arranged on the inner side wall of the filtering cavity (H2); one end of each spring strip (H5) is fixed on the inner side wall of the filtering cavity (H2).

3. The sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 1, characterized in that: A feed storage cavity (A4) is formed between the feed outer barrel body (A3) and the inner partition cylinder (A5); the exhaust pipe (E1) of the air purification device (E) communicates with the feed storage cavity (A4); a pressure relief valve (A2) is connected in the feed storage cavity (A4).

4. A sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 1, characterized in that: The sorting assembly is a centrifugal plate (J) arranged on the top surface of the inner discharge cylinder body (F3); a retaining ring (J1) is arranged on the bottom surface of the centrifugal plate (J); the retaining ring (J1) is rotatably connected to the inner side wall of the inner discharge cylinder body (F3); a plurality of sieve holes (J6) are evenly distributed on the surface of the centrifugal plate (J); the sieve holes (J6) are all arranged above the inner discharge cylinder body (F3); a screening motor (F1) is arranged inside the inner discharge cylinder body (F3); the screening motor (F1) is fixed on the inner discharge cylinder body (F3) through a first motor bracket (F101); the output end of the screening motor (F1) is fixed on the centrifugal plate (J).

5. The sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 4, characterized in that: A plurality of retaining rings (J5) coaxial with the centrifugal plate (J) are arranged on the surface of the centrifugal plate (J); the cross section of the retaining ring (J5) is in a semi-circular shape with an opening facing downwards; a support ring (F4) is arranged on the inner side wall of the outer discharge cylinder body (F2); a cover plate (F5) is placed on the support ring (F4).

6. The sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 5, characterized in that: The height from the top end of the retaining ring (J5) to the surface of the centrifugal plate (J) is the retaining ring height; the retaining ring height is equal to 0.2 to 0.35 times the diameter of the sieve hole (J6).

7. A sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 5, characterized in that: A hemispherical convex surface (J3) is arranged at the rotation center of the centrifugal plate (J); the hemispherical convex surface (J3) is coaxial with the crushing tube body (H); a plurality of concentric shunt strip groups are arranged on the surface of the centrifugal plate (J); the shunt strip groups are coaxial with the hemispherical convex surface (J3); the shunt strip groups are composed of a plurality of U-shaped shunt plates (J4); the shunt plates (J4) are distributed in a circular pattern on the centrifugal plate (J); the shunt plates (J4) between adjacent shunt strip groups are arranged in a staggered manner.

8. The sodium carboxymethyl cellulose cyclic crushing and dust removal device according to claim 7, characterized in that: The flow splitter plate (J4) is a U-shaped plate; the bottoms of the U-shaped plates all face the center of the centrifugal plate (J); the bottom of the U-shaped plate is provided with a V-shaped cone (J401).

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